CVE-2026-29091 HIGH

CVE-2026-29091: Locutus: Remote Code Execution (RCE) in locutus call_user_func_array due to Code Injection

Vendor Locutusjs
Product locutus
Weakness CWE-95 · Eval injection
Published March 6, 2026
Last update June 30, 2026

CVSS base score

8.1/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Prior to version 3.0.0, a remote code execution (RCE) flaw was discovered in the locutus project, specifically within the call_user_func_array function implementation. The vulnerability allows an attacker to inject arbitrary JavaScript code into the application's runtime environment. This issue stems from an insecure implementation of the call_user_func_array function (and its wrapper call_user_func), which fails to properly validate all components of a callback array before passing them to eval(). This issue has been patched in version 3.0.0.

Key dates

02Disclosure timeline

March 6, 2026 CVE published
June 30, 2026 Record updated